docs: def ask_visualization():
      """
      ask user which viz output to use
      """
      printDebug(
          "Please choose an output format for the ontology visualization: (q=quit)\n",
          "important")
      while True:
          text = ""
          for viz in VISUALIZATIONS_LIST:
              text += "%d) %s\n" % (VISUALIZATIONS_LIST.index(viz) + 1,
                                    viz['Title'])
          var = input(text + ">")
          if var == "q":
              return ""
          else:
              try:
                  n = int(var) - 1
                  test = VISUALIZATIONS_LIST[
                      n]  # throw exception if number wrong
                  return n
              except:
                  printDebug("Invalid selection. Please try again.", "red")
                  continue